http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
급성 심근 경색증과 혈장 Paraoxonase activity와의 관계
김건영,윤상준,박근호,조영신,장성종,장경식,홍순표 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1
연구배경: 혈장 파라옥소나제의 감소는 HDL-cholesterol의 항 산화작용의 중요한 요소로 알려져 있어 이의 감소는 항산화작용의 저하로 인해 동맥경화의 진행을 촉진시킬 수 있어 허혈성심장병의 주요 위험인자로 추정하고 있다. 본 연구에서는 급성 심근 경색증 환자를 대상으로 혈장 파라옥소나제의 활성도를 측정하여 정상군과 비교하여 혈장 파라옥소나제 활성도의 감소가 급성 심근 경색증의 위험인자인지 알아보고자 하였다. 대상 및 방법: 급성 심근 경색증으로 입원한 39 명의 환자(남자 : 여자 = 19 : 20, 평균나이: 61±4.3세)와 정상 대조군 36명(남자 : 여자 = 17 : 19, 평균나이: 55±10세)을 대상으로 정맥혈을 채혈 후 파라옥소나제 활성도와 LDL-cholesterol, total cholesterol, HDL-cholesterol를 측정하였다. 두 군간의 비교는 Student T-test를 이용하였다. 결과: 건강 대조군과 급성 심근 경색 환자군 간에 측정치를 비교해본 결과 혈장 콜레스테롤 수치는 182.10± 12mg/dl, 194.87± 40mg/dl이고 HDL 콜레스테롤은 54±5.4mg/dl, 37.52± 13mg/dl 였다. LDL 콜레스테롤은 94.45±13mg/d1, 122±34mg/d1로 급성 심근 경색증 환자의 경우 통계학적으로 의미있는 차이를 보였다. (P<0.05). 그러나 혈장 파라옥소나제 활성도는 건강 대조군 112.35±15U/ml, 급성심근 경색증 환자군 96.10±43.50U/ml로 급성 심근 경색증 환자군이 건강 대조군에 비해 낮은 수치를 보이는 경향이 있었으나 통계학적으로 유의한 차이(P=0.071)는 보이지 않았다(Table 2참조). Background : Human plasma paraoxonase is a HDL-associated ester hydrolase that catalyzes the hydrolysis of organophosphates, aromatic carboxylic acid esters and carbamates. HDL has been implicated in the prevention of LDL lipid peroxidation. Low paraoxonase activity in the Plasma may have responsibility to the development of coronary artery disease partially because oxidized LDL has intimate relationship with atherosclerosis. We studied plasma paraoxonase activities in the plasma of acute myocardial infarction patients in order to evaluate the relationship between these enzyme activities and the acute myocardial infarction. Materials and Methods : plasma samples were obtained from 39 individuals with acute myocardial infarction(M: 19 cases, F: 20cases, mean age: 61(4.3 years) and 36 individuals of healthy control(M: 17 cases, F: 19cases, mean age: 55(10 years). We determined paraoxonase activities, total cholesterol, LDL-cholesterol &DL-cholesterol levels in the plasma samples. Paraoxonase activities were measured spectrophoto metrically in 0.1M Tris-HCl buffer (pH=7.4) at 25℃ with paraoxon as substrate(5.5mM) at 405 nm. We used student T-test to compare the results of both groups. Results : Comparison of the results between myocardial infarction patients and normal control groups revealed that plasma total cholesterol, HDL-cholesterol and LDL-cholesterol levels showed statistically significant differences between groups but plasma paraoxonase activity does not. Conclusion : Our study showed that there was no significant difference of plasma paraoxonase activity between acute myocardial infarction and normal population. So low plasma paraoxonase activity may not be a risk factor of acute myocardial infarction. but further prospective large scale study will be needed to conclude.
정장표,차건봉,김좌관 慶星大學校 環境問題硏究所 1993 環境硏報 Vol.3 No.1
The purpose of this study is to find out characteristics of nonpoint source-pollutant loads For this, in the aspect of water guality Change during storm days, the relationship between Stream flow and pollutant mass loads was studied. Also the contributions of loading rates from nonpoint sources were calculated. In this study, the drainage area of Sooyeong river, upstream of the Hoedong reservoir, was investigated. The reservoir used for drinking water source in Pusan, is located in a rural area and few point sources in its drainage area. The results of this study were as follows. Changes in water quality during rainfall showed that parameters such as COD, PO₄-P, T-P, NH₄-N concentration increased about two times, on the other hand, NO₂-N, NO₃-N concentration decreased to about two third of the concentrations in drying periods. The regression equations for stream flow versus pollutant loads were obtained as follows: COD : LOG(M)=-4.531+1.396×LOG(Q) r²=0.768 NH4-N : LOG(M)=-3.227+0.948×LOG(Q) r²=0.825 NO2-N : LOG(M)=-5.744+1.216×LOG(Q) r²=0.641 T-P : LOG(M)=-8.303+1.804×LOG(Q) r²=0.811 PO4-P : LOG(M)=-7.726+1.660×LOG(Q) r²=0.820 The rate of pollutant contributions from nonpoint sources was 80.4% for COD, 75.8% for NH₄-N, 53% for NO₂-N, 57.3% for NO₃-N. 85% for T-P, 89% for PO₄-P, and that of phosphorous pollutant was higher than that of inorganic pollutants. The loading rates of nonpoint pollutants were calculated as 3.76kg/ha/d(COD), 0.2kg/ha/day(NH₄-N), 0.076kg/ha/d(T-P), 0.037kg/ha/d(PO₄-P), respectively. Results above mentioned showed that the pollutant contributions from nonpoint sources were not negligible and the control and management of nonpoint source were urgently needed.
Lim, Geon-Pyo,Park, Chan-Wook,Labios, Remund,Yoon, Yong-Beom Korea Electric Power Corporation 2015 KEPCO Journal on electric power and energy Vol.1 No.1
Energy storage systems (ESS) can be used to provide frequency regulation services in a power system to replace traditional frequency regulation power plants. Battery ESS, in particular, can provide "fast-responding frequency regulation," wherein the facility can respond immediately and accurately to the frequency regulation signal sent by the system operator. This paper presents the development and the trial run results of a frequency regulation control system that uses large-scale ESS for use in a large power system. The control system was developed initially for the 4 MW ESS demonstration facility in Jocheon Jeju Island, and was further developed for use in the 28 MW ESS facility at the Seo-Anseong substation and the 24 MW ESS facility at the Shin-Yongin substation to provide frequency regulation services within mainland Korea. The ESS facility in Seo-Anseong substation responds to a sudden drop in frequency via governor-free control, while the ESS facility in Shin-Yongin responds via automatic generator control (AGC).
모델 기반의 화력발전소 발전기 출력 제어 프로그램 개발
임건표(Geon-Pyo Lim),김문수(Mun-Soo Kim),최인규(In-Kyu Choi),박두용(Doo-Yong Park),김호열(Ho-Yol Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
The goal of this paper is to develope the control program based on model which can be applied to 1000㎿ class coal fired thermal power plant. 1000㎿ class power plant has the higher efficiency and lower cost because the steam conditions of the ultra super-critical process are higher than them of the previous power plants in temperature and pressure. The program includes the state variable controls which have the desired characteristics for the higher temperature and pressure. The program had been developed successfully using advanced process control. The simulation results using the new control program showed the better performance and safer control than them of the previous control program and we could verify the application possibility of the new program for the actual power plant through the load test, comparison, analysis and tuning.
주파수조정용 에너지저장장치 시운전 자동화 시스템의 개발과 실증
임건표(Geon-Pyo Lim),최요한(Yo-Han Choi),이승민(Seung-Min Lee),박찬욱(Chan-Wook Park) 대한전기학회 2017 전기학회논문지 P Vol.66 No.3
System to automate the trial-run of energy storage system for frequency regulation was developed and demonstrated. Basic strategy was developed on the basis of trial-run procedure and verified in the computer simulation tool. The algorithm was developed and coded for 4MW trial-run automation system. 4MW trial-run automation system was connected to 4MW energy storage system for frequency regulation in Jocheon substation of Jeju city and demonstrated. 24MW trial-run automation system was developed on the basis of 4MW trial-run automation system and verified by operation system for 24MW energy storage system for frequency regulation. The operation system has own simulation model of energy storage system and power system. The verification was performed to improve the system in the view of user. 24MW trial-run automation system was demonstrated in 32MW Ul-san and 36MW Non-gong energy storage system. All tests of trial-run was done by manual and first they ware taken 1 week with no trial-run automation system. The manual trial-run tests were taken by maximum three times. Trial-run test by trial-run automation system was taken 2 days. The system helps reduce the trial-run test period and improve the accuracy of tests.
주파수조정용 에너지저장장치 운전제어 기술의 개발과 계통연계 자동제어 운전
임건표(Geon-Pyo Lim),최요한(Yo-Han Choi),임지훈(Ji-Hoon Im) 대한전기학회 2016 전기학회논문지 P Vol.65 No.4
Grid-connected, large-capacity energy storage systems (ESS) can be used for peak load supply, frequency regulation, and renewable energy output smoothing. In order to confirm the capability of battery ESS to provide such services, 4MW/ 8MWh battery ESS demonstration facility was built in the Jocheon substation on Jeju Island. The frequency regulation technology developed for the Jocheon demonstration facility then became the basis for the 28MW and 24MW frequency regulation ESS facilities installed in 2014 at the Seo-Anseong and Shin-Yongin substations, respectively. The operation control systems at these two facilities were continuously improved, and their successful commercialization led to the construction of additional ESS facilities all over Korea in 2015. In seven (7) locations nationwide (e.g., Shin-Gimje and Shin-Gyeryeong), a total of 184 MW of ESS had been commercialized in 2016. The trial run for the new ESS facilities had been completed between April and May in 2016. In this paper, results of the trial run from each of the ESS facilities are presented. The results obtained from the Seo-Anseong and Shin-Yongin substations during a transient event by a nuclear power plant trip are also presented in this paper. The results show that the frequency regulation battery ESS facilities were able to quickly respond to the transient event and trial run of ESS is necessary before it is commercialized.